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A. W. BARTHOLOMEW; STOCK POR THRBADING AND CUTTING OTT RODS.

Patented Sept. 17, 1895.

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UNITED STATES ATENT FEI-CE.

ALBERT W. BARTHOLOMEW, OF BOSTON, MASSACHUSETTS, ASSICNOR OF ONE-HALF TO CHESTER M. SPRAGUE, OF SAME PLACE.

STOCK FOR THREADING AND CUTTING OFF RODS.

SPEGTLFICATION forming part of Letters .Patent No. 546,573, dated September 17, 1895.

Appncanon med Apu-1 24,1895. serial No. 546.995. uro modem To all whom t may concern,.-

Beit known that I, ALBERT W. BARrHoLo- MEW, residing in Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Stocks for Threading and Cutting Off Rods, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention relates to a cutting-off and die-stock machine of the vclass shown and described in United States Patent No. 395,686, granted to me January 8, 1889, and has for its object to improve the construction of the same, whereby a simpler and more efficient instrument or machine may be obtained.

One feature of this invention consists in an improved construction of the stock or frame of the instrument, as will be described.

Another feature of the invention consists in a novel construction for automatically feeding the operating-tools. u

The invention further consists in a novel construction, as will be described, for automatically supplying oil to the operating parts.

These and other features of this invention will be pointed out in the claims at the end of this specication.

Figure l is a front elevation of an instrument or machine embodying this invention; Fig. 2, a side elevation of the instrument shown in Fig. 1 with the die-stock shown in a position at right angles to that shown in Fig. 1 to more clearlyillustrate the operation of the automatic feed; Fig. 3, a detail in plan of the chuck removed; Fig. 4, agtransverse section on the line et 4, Fig. 2; and Fig. 5,`a sectional detail, on an enlarged scale, on the line 5 5, Fig. 1.

The instrument herein shown comprises two parts-namely, a stock A and a chuck A. The stock A in accordance with this invention is composed of a frame or casting having a parallel-sided substantially-oblong slot or opening d', the side walls 2 3 of the said opening having secured to or forming part of them two sets of inwardly-projecting ribs or ledges a2 0.3 a4a5, forming guides for tool-carriers 0.5 a7, which are provided on their opposite sides with longitudinal grooves or channels o, into which the guiding-ribs extend, as

represented in Fig. 5. The guiding-ribs d2 a3 constitute the support for the tool-carrier ab' and are located on one side of the transverse center of the slotor opening a', and the guiding-ribs a4 0,5 constitute the support for the carrier a7 and are located on the opposite side of the said transverse center, the ribs a4 of being herein shown as separated from the ribs a a3.

The ribs a2 a3 extend toward the end am of the opening a', but not to the said end, so that the side walls 2 3 are left smooth for a distance between the ends of the ribs 23 and the end d10 of the slot a equal to or greater than the length of the carrier 0.6 to permit the carrier to be slid off from its guides a2 a3 and removed from the stock A.- The guide-ribs a4 a5 may also be extended vtoward the end cl2 of the slot o. in a similar manner, so as to leave the side walls 2 3 smooth for a distance equal to or greater than the length of the carrier a7 to permit the said carrier to be slid olf from its guides a4 a5 and removed from the stock A. f

The carriers 0,6 a7 are adapted to be positively moved toward and from each other on their supporting-guides bymeans of screwthreaded rods b b extended into hollow handles b2 b3, which are preferably detachably secured to the rods b b, as will be described, and as the connections ofboth screw-rods to their handles arealikeI will specifically describe but one.

.Referring to Fig. 1, the screw-rod b is provided with a smooth rear portion 5, which extends into a sleeve b4 supported by the stock A, the said sleeve being provided, as hereinl shown, with two annular grooves b 197, into which project screws b? b9, extended through the enlarged portion 6 of the handle b3, the said enlarged portion being fitted over the sleeve b4. The handle bi is secured by the screws bs b9 to the sleeve against longitudinal movement and is free to turn thereon by reason of the screws bs b9 traveling in the annular grooves h6 57. The sleeve b4 is rigidly secured to the stock A in any suitable or desired manner, and in order to impart a rotary movement to the screw-rod b by the turning of the handle b3 the latter is detachably connected to the portion 5 of the screw-rod.

The attachment of the handle b3 to the IOO screw-rod Z1' may be effected after the manner herein represented-namely, by providing the end ot' the smooth portion 5 of the screw-rod with a milled or toothed disk Z110, with which engages a set-screw Z112 extended through the handle Z13, so that when the handle Z13 is rotated or turned a rotary movement will be imparted to the screw-rod Z1' by the connections Z110 Z112.

By unscrewing the set-screw Z112 it will be seen that the handle Z13 may be disconnected from the screw-rod Z1', so that the handle may be turned without imparting any rotary movement tothe screw-rod Z1', and therefore without effecting any longitudinal movement of the tool-carrier a7. The connection of the screw-rod Z1 with its operating-handle b2 is and may be effected in the same manner. The screw-rod Z1' has also fast to it a ring, disk, or collar Z111, provided on its periphery with a series of teeth or arms Z115, which are adapted to be rotated by the engagement of a tooth or arm Z115 with a stud or projection Z11G on an arm Z117 of the chuck A', as will be more specifically described hereinafter.

The carriers d a7, as represented in Fig. l, are provided with removable cutters c c', which, as shown, are secured to the rear side of the said carriers, and one feature ot this present invention consists in providing a more secure attachment of the cutters to their carriers, and as this attachment is the same in both I will specifically describe but onenamely, that of the cutter-carrier 07.

Referring to Fig. 5, the carrier 0,7 is shown as provided on what may be termed its rear side with a slot or opening Z130, having one of its side walls Z131 made straight and the other side wall Z1"12 beveled, with which latter Wall co-operates a correspondingly-beveled side Z133 of the cutter c', the opposite side of the cutter being made straight and being engaged by the beveled side Z131 of a clamping-plate Z135, having its opposite side wall made straight to engage the straight wall Z131. The clampingplate Z135 has secured to or forming part of it a bolt or rod Z136, threaded at its end and extended through a suitable hole in the carrier a1, the projecting threaded end of the said bolt or rod being engaged by a nut Z137, by means of which the clamping-plate may be drawn toward the carrier, so that its beveled side Z134 will force the cutter c' toward and into engagement with the beveled side Z132, between which and the beveled side Z131 of the clamp the cutter is firmly held.

It will be noticed that the beveled side Z131 ot the clamp and the beveled side Z132 form a dovetailed slot, in which the cutter c' is located. The cutter c' may be quickly and easily removed by unloosening the nut Z1?7 and withdrawing the clamp Z1'F15 from engagement with the critter to permit it to be slid out from the carrier.

The stock A may be secured to a chuck A', (shown separately in Fig. 3,) the said chuck, as

herein shown, consisting of an open substantially-rectangular trame, composed of the side bars CZ cZ' and end bars Z2 (Z3, the end bar (Z2 having secured to or forming part of it the arm Z117.

The end bar (Z3V of the chuck-frame is provided with suitable holes, through which are extended two rods cZ1cZ5, connected by a crossbar do, the said rods being made preferably round and fitted into substantially-semicir- Acular grooves CZ6 (Z7 in the side bars (Z CZ', (see Fig. 4,) the saidrods being extended into substantially-semicircular grooves in the sides of a work-holding jaw (Z8, which is fitted into the opening of the chuck-frame A', and is secured to the rods cZ'1cZ5 to move therewith by pins d extended through the jaw and the said rods.

The rods CZ" (Z5 form guides for a work-holding jaw d1", tted into the opening of the chuck-frame and having its sides provided with substantially semicircular grooves, which embrace the rods (Z4 (Z5, the jaw (Z111 having a threaded opening or socket in one end, into which extends the threaded end of a rightand-left threaded rod (Z12, extended through a threaded hole in the cross-bar c f.

The screw-rod (112 is provided with a collar (Z50, fitted into an opening in the end barcZof the chuck-frame and secured against Alongitudinal movement by a forked or yoke-shaped plate OZ, dovetailed into the end bar d3, as clearly shown in Fig. 3, and embracing a groove in the said collar.

The Work-holding jaws (Z8 (Z111 travel in opposite directions when the threaded rod (Z12 is turned-that is, when the rod Z12 is turned in one direction-as, for instance, in the direction indicated by arrow 20, Fig. S-the cross head or bar CZ, the rods (Z (Z5, and the jaw Z8 will move in the direction indicated by arrow 22, and at the same time the jaw (Z111 will move on the rods Z4 in an opposite direction until the work operated upon is firmly clamped by the said jaws, the said work being shown in the present instance as a solid bar CZSO, which it is supposed to be cut by the cutters c c'.

Vthen the rod Z12 is turned in the direction opposite to that indicated by the arrow 20, the jaws Z8 @Z111 will move in opposite directions and will release the work, the jaw (Z51 traveling in the direction opposite to that indicated by the arrow 22 and the jaw d10 traveling iii the direction indicated by said arrow.

The chuck A and the stock A ruay and preferably will be secured together after the manner herein shown, the chuck being provided with a ring d1", having an annular groove eZ16, into which extend flanges (Z1r (Z111 on plates d1 (Z211, which are secured to the stock A by suitable clamping-screws cZ21, (see Fig. 5,) extended through elongated slots in the said plates, which construction permits the said plates when unclamped from the stock to be slid or moved outward a sufticient IOO IIO

distance to withdraw their flanges from the annular groove elle, and yet leave the said plates secured to thestock.

In the present instance I have shown the carriers a6 a7 as provided with cutters for severing the work; but when it is desired to cut a thread on the work the 4carriers a6 al may be removed and other carriers having threadcutting dies may be substituted therefor.

In order to increase the efficiency of the tool, it is desirable that the work be kept well oiled at the surface operated on, and to accomplish this result the stock is provided with an oil reservoir or can e, preferably detachably secured to the stock (see Fig. l) and having a nozzle c extended through a suitable hole in one side of the stock, substantially at the center of the same.

The oil can or receptacle e may and preferably will be provided with a projecting plate or arm c2, slotted as at e3, as herein shown, for the reception of clamping-screws e4, adapted to enter suitable threaded sockets in the stock A, and by which the said plate and the oil-receptacle are firmly secured to the stock A to revolve therewith.

The oil can or receptacle may and preferably will be provided with a bulging or spring-like bottom, which is adapted to be struck by a projection e6 carried by the chuck, it being herein shown as carried by the crossbar d6.

The side walls 2 3 of the stock may each be provided with a scale (see Fig. 1) to assist in accurately adjusting the cutters.

The operation of my improved instrument may be brieiiy described as follows: The bar or other work being operated on is firmly clamped in the chuck between the jaws d8 d10,

and the cutter-carriers 0.6 a7 are then adj usted inthe stock A to the desired or proper position. The stock A is then turned about the work in the direction indicated by the arrow 40, Fig. l, by means of the handles b2 h3, and if it is desired to automatically feed the cutters the handles are disconnected from the screw-rods b' b by unloosening the set-screws Z912, and during each revolution of the stock A about the work the screw-rods l) b are partially rotated by the engagement of an arm Z915 on the ring, disk, or wheel 514 with the stud or projection b, During each revolution of the stock A, the bottom of the o il receptacle or can e engages the stud or projection and forces a quantity of oil out of the nozzle c onto the work, thereby facilitating the operation of the cutters. When the stock A is used independent of the chuck-as, for instance, in cuttinga thread on a piece ofpipe-the cutter-carriers may be fed by turning the handles h2 b3, which are in this case fastened to the screw-rods b b by the set-screws Z912.

I claim- 1. In a cutting-off and die-stock machine, the combination of the following instrumentalities,` vizz-a stock provided with a substantially oblong opening, cutter carriers movable longitudinally in said opening, threaded rods connected to said cutter carriers and having smooth extensions 5 vprojecting through the end walls of the said opening, stationary sleeves 'carried by the said end walls and through which the smooth extensions 5 project, handles fitted over the said sleeves and secured thereto against longitudinal movement but capable of rotary movement thereon, and means to connect the said handles with the extensions of the threaded rods, to effect rotation of the said rods by a rotary movement of the handles on the said sleeves, substantially as described.

2. In a cutting-off and die stock-machine, the combination of the following instrumentalities, viz:-a stock -provided with a substantially oblong opening,. cutter carriers movable longitudinally in said opening, threaded rods connected to said cutter carriers and extended through the end walls of the said opening, toothed wheels or disks fast on the said threaded rods, handles attached to said stock to rotate the same, means to connect the said handles to the threaded rods and to permit the same to be disconnected therefrom, a chuck to which the stock is secured to revolve thereon, and a projection carried by the chuck to engage vthe toothed wheels or disks and rotate the threaded rods independent of the handles when the latter are disconnected from the said rods, substantially as described.

3. In a cutting-off and die-stock machine, the combination of the following instrumentalities, viz:-a work holding chuck, a tool carrying stock revoluble thereon, an oil receptacle carried by said stock, and means on the chuck to engage the oil receptacle in the revolution of the stock to eject oil from the said receptacle, for the purpose speciiied.

4. In a cutting-olf and die-stock machine, the combination of the following instrumentalities, vizz-a work holding chuck, a tool carrying stock revoluble thereon, an oil receptacle detachably carried by said stock, and means on the chuck to engage the oil receptacle in the revolution ot' the stock to eject oil from the said receptacle, for the purpose specified.

5. In a cutting-olf and'die-stock machine, the combination of the following instrumentalities, vim-a stock provided with a substantially oblong opening a', cutter carriers movable longitudinally in said opening, threaded rods connected to the said carriers and extended through the end walls of said opening, handles attached to the said rods, and an oil can or receptacle detachably secured to one side of the stock and provided with a nozzle projecting into the opening a substantially at right angles to the length of the opening and to the handles, substantially as described.

6. In a cutting-off and die-stock machine, the combination of the following instrumentalities, vizz-the stock A provided with the .IIO

substantially oblong slot or opening d having its side Walls provided with guiding ribs or ledges of less length than said opening, cutter carriers inserted in said opening and mounted to slide on said guiding ribs,threaded rods I) b connected to the said cutter carriers and having extensions 5 projecting through the end Walls of the said opening, stationary sleeves carried by the stock through which the said extensions project, handles fitted over the said sleeves and secured thereto against longitudinal movement but capable of rotary movement thereon, and means to connect the said handles with the extensions of the threaded rods, substantially as described.

7. In a cutting-oit and die-stock machine, the combination of the following instrumentalities, viz: a stock, cutter carriers movable in an opening in said stock, threaded rods connected to said carriers to move the same, toothed Wheels or disks on said threaded rods Within the openings in the stock, and handles attached to the stock, and means to conneet the handles to the threaded rod and which permit the said handles to be disconnected from the threaded rods while remaining attached to the stock, substantially as described.

In testimony whereof I have signed my name to this specifica-tion in the presence of two subscribing witnesses.

ALBERT W. BARTIIOLOMEW.

Vitnesses:

JAS. I-I. CHURCHILL, J. MURPHY. 

